Secrets of Patagonia's rare and violent volcanoes

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Secrets of Patagonia's rare and violent volcanoes,
September 25, 2015,
By Hugh Tuffen,
BBC Earth,

Volcanic eruptions are some of the most powerful and unpredictable natural phenomena on Earth. Investigating one of the world's rarest and most explosive types of eruption in Patagonia could help save lives across the globe, explains Hugh Tuffen